Santa Rosa, Calif., Sept. 9, 2015 – The City of Santa Rosa,
California, is collaborating with Trane, a leading global provider of
indoor comfort solutions, and services and a brand of Ingersoll Rand,
to execute an innovative project that will increase energy
independence at the city’s Laguna Wastewater Treatment Plant which is
managed by the city’s water department, Santa Rosa Water.

Trane chose Santa Rosa’s Laguna Wastewater Treatment Plant for the
project to implement a $5 million grant from the California Energy
Commission, the state’s primary energy and planning agency. The
project team, which represents companies contributing $2 million in
technology development funding, includes, among other companies,
Alstom Grid, the world’s leading power-transmission company.

“Being selected for this grant is a great example of our commitment
to our community’s future,” said David Guhin, director of Santa Rosa
Water. “Santa Rosa strives to find innovative and cost-effective
solutions that improve energy efficiency, optimize energy production,
and reduce greenhouse gas emissions, making this project a huge win.”

The Laguna Treatment Plant is responsible for treating wastewater
from the California communities of Santa Rosa, Sebastopol, Cotati,
Rohnert Park, and other areas of Sonoma County. The project will
transform the plant into an advanced microgrid and also will decrease
dependence upon the traditional energy grid by incorporating
additional renewable energy.

Anticipated benefits of transforming the plant into an advanced
microgrid include stabilizing energy costs, providing additional
revenue sources, and delivering the grid services needed to allow
increased use of renewable energy, including solar and wind. The
microgrid is anticipated to be operational in late 2016.

“We’re leveraging existing technology to support better regional
energy management by making our operations more efficient and putting
available energy back onto the grid for other consumers to use,” said
Michael Day, utility solutions vertical market leader for Trane in
California, and the principal proposal author. “The project also will
support the use of more solar and wind renewables.”

An Efficient Operation Means Available Energy for Other UsersThe
microgrid will pull power from the main grid when excess energy is
available, allowing Santa Rosa to easily switch back and forth to
help balance power on the main grid.

To treat wastewater from approximately 230,000 customers, the
treatment plant recycles approximately 17.5 million gallons of water
per day, which requires approximately four megawatts of energy.
Roughly 30 percent of this energy is generated on-site by beneficially
using digester gas to run engine-driven generators. The other 70
percent of energy demanded for treatment currently comes from the main
electrical grid and costs up to $3.5 million a year.

The project team selected the treatment plant for the upgrade from
among more than 60 wastewater treatment plants statewide based on its
strong infrastructure and its size: neither too large nor too small.

Energy upgrades will contribute to a low-carbon future at the
wastewater treatment plant, and will also include integrated solar
power and energy storage. Implementation will also include an advanced
distributed energy management software system, an innovative microgrid
controller and smart inverter systems provided by Alstom Grid.

The project team plans to decrease dependence on the grid and
increase the amount of energy generated onsite by reusing the digester
gas and combining it with renewable energy sources. This will reduce
the overall carbon footprint of the wastewater plant, leaving more
energy available for commercial users in the region and potentially
generating a revenue stream for the city.

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About
Ingersoll Rand and TraneIngersoll
Rand (NYSE:IR) advances the quality of life by creating comfortable,
sustainable and efficient environments. Our people and our family of
brands — including Club Car®, Ingersoll Rand®,Thermo King®
and Trane®
— work together to enhance the quality and comfort of air in homes
and buildings; transport and protect food and perishables; and
increase industrial productivity and efficiency. We are a $13
billion global business committed to a world of sustainable progress
and enduring results. Trane solutions optimize indoor environments
with a broad portfolio of energy efficient heating, ventilating and
air conditioning systems, building and contracting services, parts
support and advanced control. For more information, visit www.ingersollrand.com or www.trane.com.

About
Santa Rosa WaterSanta
Rosa Wateris governed by a seven-member board appointed by the Santa
Rosa City Council. The City of Santa Rosa Water Department provides
water and sewer service to 53,000 customer accounts and operates the
Laguna Wastewater Treatment Plant and a recycled water distribution
system that serves a regional population of 230,000. For more
information, visit srcity.org/water,
email srwater@srcity.org,
or call (707) 543-4200.